.main-content 
{
    display: table;
    width: 100%;
}
.product-category-tree
{
    float:left;
    padding: 10px;
    padding-right: 40px;
    width: 250px;
    height:600px;
    border-right: 1px solid #ccc;
    overflow: auto;
}

.product-category-edit
{
    padding: 30px;
    float: left;
    width:500px;
}

.product-category-select
{
    font-style: italic;
    text-decoration: underline;
}